1. Time for some upgrades in server hardware and software to enhance security and take AK to the next level. Please contribute what you can to sales@audiokarma.org at PayPal.com - Thanks from the AK Team
    Dismiss Notice

Kappa 9 Rear Port

Discussion in 'Infinity Loudspeakers' started by Ashemo, Sep 10, 2018.

  1. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    Probably a really dumb question...
    Is the port above the rear tweeter just an open bass port covered with fabric?

    Thanks
     

     

    Please register to disable this ad.

  2. swechsler

    swechsler Frog Whisperer

    Messages:
    5,135
    Location:
    7th row center
    No, it's an exit for the polydome midrange so it peforms a dipole at higher frequencies (same reason there's a rear tweeter). The woofer compartment is sealed.
     
  3. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    Is it an exit for the front mounted polydome? The polydome midrange is rear firing?

    Thanks
     
  4. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    I searched for an as built drawing/schematic on these speakers and can't find anything. I want to know what is behind the fabric on the rear port, if anything.

    Thank you
     
  5. Superampman

    Superampman AK Member

    Messages:
    3,886
    Location:
    Kitchener, ON.
    If you remove the polydome you will find a 5" tube with some loose stuffing behind which is the fabric cover you refer to
     
  6. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    Perfect! My daughter and her friend helped me move them, gently. They may have pushed in on the back port fabric by mistake when they picked it up. I wanted to make sure there was nothing behind the fabric that could have been damaged, like a dome. Appreciate the help.

    Does anyone have simple as built drawings of these? I have the electrical schematics.

    Thanks
     

     

    Please register to disable this ad.

  7. Bahamayellow

    Bahamayellow Well-Known Member

    Messages:
    772
    Hello have you had your K9s long. I have some also. Post pics of your setup when you get a chance. I like seeing the setups.
     
  8. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    I just got them. I will be setting them up this weekend. They are very nice - black version. I will initially be using Denon POA-6600 monoblocks paired with the matching preamp, tuner and CD player. This is the setup as bought when new. I hear a lot about power requirements but the original owner said he bought the system new in this configuration and has had no issues. I will post pictures next week.

    I am currently using a Sansui BA/CA 2000 amp/preamp paired with and Accuphase T-100 tuner and Sony ES CD player. Also Klipsch Lascala speakers upgraded with Bob Crites crossovers and tweeters. Sounds really awesome but I anticipate the K9's will sound better and I always wanted a pair.
     
  9. swechsler

    swechsler Frog Whisperer

    Messages:
    5,135
    Location:
    7th row center
    The Kappas are a wholly different type of speaker. I've never owned a pair of Klipsch but would be curious as to how they compare.
     
  10. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    I have looked online for some comparisons. I haven’t really found anything. I’m curious too. The closer I get to setting the K9s up this weekend, the better the lascalas sound. Funny how that works...

    I’m keeping both regardless.

    I’ll let you know.
     
  11. StimpyWan

    StimpyWan AK Subscriber Subscriber

    Messages:
    4,085
    Location:
    Blue Ridge Mountains!
    If I'm remembering correctly, High Performance Review magazine reviewed the Denon POA-6600 amps when released. I don't remember much about the review now, other than a mention that Denon owned and used a pair of Kappa 9's for amp testing. Just to make sure their amps could drive a low impedance. So, that Denon stack should work for you...! :biggrin:
     

     

    Please register to disable this ad.

  12. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    That’s great news and much appreciated!
     
  13. okeeteekid

    okeeteekid Well-Known Member

    Messages:
    831
    Location:
    Northern NJ
    When I was auditioning to purchase the 1st gen k9's on those amps, the guy was pushing the 9's over the 8's and was playing the 9's pretty loud when the denons went up in white smoke, he tried to lower the volume ASAP but it was too late, damage done, I then told him... I will take the 8's, true story.
     
    7.62 likes this.
  14. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    Wow. That’s not good news. Now I’m batting .500.

    Anyone else have experience with this combo?
     
  15. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    If the denons aren’t stable under this load what do you recommend? I would like to keep it simple and not run separate power sources for the top and bottom end if possible. I’m not sure about adjusting the gains, etc. Maybe there is a thread that could walk me through biamping correctly as I have had highly efficient speakers in the past. This is a new game for me.

    I do have a PA amp I could power the bottom end with and run the denons on the top end but I guess that would be a compromise in sound quality.

    I am wondering if the shop you were at had the woofers set to extended mode? I plan on setting it at normal mode to lessen the overall load.

    Maybe I should save for a threshold, krell or ML ?
     
  16. Bahamayellow

    Bahamayellow Well-Known Member

    Messages:
    772
    I would say hook them up just be careful with the volume, maybe check to see how hot the amps get. That’s what I did when I hooked up my carver amps. One couldn’t cut it but 2 in bi amp mode is a different speaker. I not sure how big ur room is. Mine is very small. So I don’t need to crank them very high. Also I’m running the bass in normal mode on the switch and its got plenty. No sub required. It will hit Deep bass notes if the music has it.

     
    7.62 likes this.

     

    Please register to disable this ad.

  17. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    I’ll give the denons a try in normal mode. My living room is fairly small. I play my lascalas pretty loud. I live in the country so nobody yells at me. Maybe louder than pretty loud...
     
    7.62 likes this.
  18. swechsler

    swechsler Frog Whisperer

    Messages:
    5,135
    Location:
    7th row center
    A relatively inexpensive amp that should be able to handle the K9s no problem is the Aragon 4004. No problems with super-low impedance loads and can put out 400 watts/channel into 4 ohms.
     
  19. Ashemo

    Ashemo AK Subscriber Subscriber

    Messages:
    65
    Location:
    Ferndale CA
    Perfect. Is the 8008 better? I saw one recently for a reasonable price. How is the sound quality of these amps? I really only want to do this once. I have a lot of lesser powered amps as a result of incremental upgrades. I should have just went big the first time...

    Thanks
     
  20. swechsler

    swechsler Frog Whisperer

    Messages:
    5,135
    Location:
    7th row center
    This thread on the Polk forum says the 8008 is a technically superior design. A lot of people say Aragons are a poor man's Krell (and some disagree).
     

Share This Page